Measurement of micro-vibration frequency along optical axis using spatial frequency analysis of video images

Chihiro Okamura; Atsushi Osa; Kazuyuki Miura

doi:10.1117/12.2666845

25 March 2023 Measurement of micro-vibration frequency along optical axis using spatial frequency analysis of video images

Chihiro Okamura, Atsushi Osa, Kazuyuki Miura

Author Affiliations +

Proceedings Volume 12592, International Workshop on Advanced Imaging Technology (IWAIT) 2023; 125922D (2023) https://doi.org/10.1117/12.2666845
Event: International Workshop on Advanced Imaging Technology (IWAIT) 2023, 2023, Jeju, Korea, Republic of

Abstract

This study proposes a method for detecting micro-vibrations along the optical axis of a target object using video image analysis. The proposed method detects vibrations as time variances in the scaling factor of the object by checking the shift in the peaks in the spatial power spectrum of the images. We conducted an experiment wherein a checkerboard placed 2 m below the video camera was vibrated using an actuator. The results show that the proposed method could measure the vibration frequency even when the amplitude is 0.25 permille of the shooting distance.

Citation Download Citation

Chihiro Okamura, Atsushi Osa, and Kazuyuki Miura "Measurement of micro-vibration frequency along optical axis using spatial frequency analysis of video images", Proc. SPIE 12592, International Workshop on Advanced Imaging Technology (IWAIT) 2023, 125922D (25 March 2023); https://doi.org/10.1117/12.2666845

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